diff --git a/src/mesh/NineSlicePlane.js b/src/mesh/NineSlicePlane.js
index 297e460..61ba5ee 100644
--- a/src/mesh/NineSlicePlane.js
+++ b/src/mesh/NineSlicePlane.js
@@ -363,7 +363,7 @@
         this.updateHorizontalVertices();
         this.updateVerticalVertices();
 
-        this.dirty = true;
+        this.dirty++;
 
         this.multiplyUvs();
     }

diff --git a/src/mesh/NineSlicePlane.js b/src/mesh/NineSlicePlane.js
index 297e460..61ba5ee 100644
--- a/src/mesh/NineSlicePlane.js
+++ b/src/mesh/NineSlicePlane.js
@@ -363,7 +363,7 @@
         this.updateHorizontalVertices();
         this.updateVerticalVertices();
 
-        this.dirty = true;
+        this.dirty++;
 
         this.multiplyUvs();
     }
diff --git a/src/mesh/Plane.js b/src/mesh/Plane.js
index 4f9b51c..4dd2398 100644
--- a/src/mesh/Plane.js
+++ b/src/mesh/Plane.js
@@ -94,7 +94,7 @@
         this.uvs = new Float32Array(uvs);
         this.colors = new Float32Array(colors);
         this.indices = new Uint16Array(indices);
-        this.indexDirty = true;
+        this.indexDirty++;
 
         this.multiplyUvs();
     }